U.S. patent number 9,979,426 [Application Number 15/412,871] was granted by the patent office on 2018-05-22 for watch-type mobile terminal including antenna.
This patent grant is currently assigned to LG ELECTRONICS INC.. The grantee listed for this patent is LG ELECTRONICS INC.. Invention is credited to Namsoo Kim, Youngsoo Na, Jaewook Yu.
United States Patent |
9,979,426 |
Na , et al. |
May 22, 2018 |
Watch-type mobile terminal including antenna
Abstract
A watch-type mobile terminal including an antenna is provided.
The watch-type mobile terminal may include a body configuring an
external appearance of a watch and operating as a loop antenna, a
plurality of feeding units applying each of a plurality of
communication signals to the loop antenna, and a ground part
connected to a ground of the watch. In this case, the body may
include a metal housing connected to the ground part and
corresponding to an outer loop, a metal bezel connected to the
plurality of feeding units and corresponding to the inner loop, and
a slot member disposed between the metal housing and the metal
bezel to electrically disconnect the metal housing from the metal
bezel. An antenna for providing a plurality of communication
services may be provided.
Inventors: |
Na; Youngsoo (Seoul,
KR), Yu; Jaewook (Seoul, KR), Kim;
Namsoo (Seoul, KR) |
Applicant: |
Name |
City |
State |
Country |
Type |
LG ELECTRONICS INC. |
Seoul |
N/A |
KR |
|
|
Assignee: |
LG ELECTRONICS INC. (Seoul,
KR)
|
Family
ID: |
59359913 |
Appl.
No.: |
15/412,871 |
Filed: |
January 23, 2017 |
Prior Publication Data
|
|
|
|
Document
Identifier |
Publication Date |
|
US 20170214422 A1 |
Jul 27, 2017 |
|
Foreign Application Priority Data
|
|
|
|
|
Jan 27, 2016 [KR] |
|
|
10-2016-0010185 |
|
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
G04G
21/04 (20130101); H01Q 5/328 (20150115); H01Q
7/00 (20130101); H01Q 5/35 (20150115); H04B
1/385 (20130101); H04W 4/80 (20180201); G04R
60/06 (20130101); H01Q 1/273 (20130101); H04B
2001/3861 (20130101); H04W 84/12 (20130101); H04W
88/06 (20130101) |
Current International
Class: |
H04B
1/3827 (20150101); H04W 4/00 (20180101); H04W
84/12 (20090101); H04W 88/06 (20090101) |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Trandai; Cindy
Attorney, Agent or Firm: Lee Hong Degerman Kang &
Waimey
Claims
What is claimed is:
1. A watch-type mobile terminal comprising: a body configured to
function as a loop antenna having an inner loop and an outer loop;
a display positioned relative to the body; wireless communication
unit coupled to the body for performing wireless communications; a
controller operatively coupled to the display and wireless
communication unit to permit controlling of the display and the
wireless communication unit; a plurality of feeding units providing
a plurality of communication signals to the loop antenna, wherein
the plurality of feeding units comprise a first feeding unit and a
second feeding unit; and a ground part connected to a ground of the
watch-type mobile terminal, wherein the body comprises: a metal
housing electrically connected to the ground part, the metal
housing forming the outer loop; a metal bezel electrically
connected to the plurality of feeding units, the metal bezel
forming the inner loop; and a slot member disposed between the
metal housing and the metal bezel to electrically disconnect the
metal housing from the metal bezel, and wherein the first feeding
unit and the ground part are connected to the inner loop and the
outer loop, respectively and the second feeding unit and the ground
part are connected to the inner loop and the outer loop,
respectively.
2. The watch-type mobile terminal of claim 1, wherein the plurality
of feeding units further comprise: a third feeding unit; wherein
the first feeding unit provides a communication signal, among the
plurality of communication signals, at a first frequency band and
at a second frequency band for a mobile communication service; the
second feeding unit applies a communication signal, among the
plurality of communication signals, at a third frequency band and
at a fourth frequency band for a Wi-Fi or Bluetooth communication
service; and the third feeding unit applies a radio frequency (RF)
signal, among the plurality of communication signals, at a fifth
frequency band for a global positioning system (GPS) service.
3. The watch-type mobile terminal of claim 2, wherein the third
feeding unit is slot-fed to a space between the inner loop and the
outer loop.
4. The watch-type mobile terminal of claim 2, wherein the second
frequency band is a frequency band which is higher than the first
frequency band, and wherein a length of a circumference of the loop
antenna is set to a half wavelength at the first frequency band and
is set to one wavelength at the second frequency band.
5. The watch-type mobile terminal of claim 2, wherein the fourth
frequency band is a frequency band which is higher than the third
frequency band, and wherein a length from the second feeding unit
to the ground part is set to a half wavelength at the third
frequency band and is set to one wavelength at the fourth frequency
band.
6. The watch-type mobile terminal of claim 2, wherein the third
feeding unit corresponds to a 1/4 point of a length of a
circumference of the loop antenna.
7. The watch-type mobile terminal of claim 2, wherein the first
feeding unit, the second feeding unit, and the third feeding unit
are vertically coupled to the loop antenna.
8. The watch-type mobile terminal of claim 1, wherein one end of
each of the inner loop and the outer loop is close to another end
of each of the inner loop and the outer loop so that a radio
frequency (RF) signal at the one end of each of the inner loop and
the other loop is coupled to a respective one of the another end of
the inner loop and the outer loop, and wherein the another end of
each of the inner loop and the outer loop is open.
9. The watch-type mobile terminal of claim 1, wherein the metal
housing and the metal bezel are connected to each other at one
end.
10. The watch-type mobile terminal of claim 1, wherein the
plurality of feeding units each comprise a pin into which a spring
is inserted, wherein the pin, for each of the plurality of feeding
units, is accommodated in a groove of the metal bezel, and wherein
the metal bezel and the pin are electrically connected to each
other when the metal bezel rotates.
11. The watch-type mobile terminal of claim 1, wherein the
plurality of feeding units each comprise an arch-type spring, and
wherein when the spring, for each of the plurality of feeding
units, contacts a contact guide of the metal bezel and the metal
bezel rotates, the metal bezel and the pin are electrically
connected to each other.
12. An antenna, comprising: an inner loop having an open end; an
outer loop spaced apart from the inner loop by a separation
distance; a connector connected to one end of each of the inner
loop and the outer loop; a plurality of feeding units providing a
plurality of communication signals to one of the inner loop and the
outer loop, wherein the plurality of feeding units comprise a first
feeding unit and a second feeding unit; and a ground part connected
to a ground of a watch in one of the inner loop or the outer loop,
wherein the inner loop and the outer loop are accommodated in a
body for a watch-type mobile terminal, and wherein the first
feeding unit and the ground part are connected to the inner loop
and the outer loop, respectively and the second feeding unit and
the ground part are connected to the inner loop and the outer loop,
respectively.
13. The antenna of claim 12, wherein the plurality of feeding units
further comprise: a third feeding unit; wherein the first feeding
unit provides a communication signal, among the plurality of
communication signals, at a first frequency band and at a second
frequency band for a mobile communication service; the second
feeding unit applies a communication signal, among the plurality of
communication signals, at a third frequency band and at a fourth
frequency band for a Wi-Fi or Bluetooth communication service; and
the third feeding unit applies a radio frequency (RF) signal, among
the plurality of communication signals, at a fifth frequency band
for a global positioning system (GPS) service.
14. The antenna of claim 13, wherein the third feeding unit is
slot-fed to a space between the inner loop and the outer loop.
15. The antenna of claim 13, wherein the second frequency band is a
frequency band which is higher than the first frequency band, and
wherein a length of a circumference of the loop antenna is set to a
half wavelength at the first frequency band and is set to one
wavelength at the second frequency band.
16. The antenna of claim 13, wherein the fourth frequency band is a
frequency band which is higher than the third frequency band, and
wherein a length from the second feeding unit to the ground part is
set to a half wavelength at the third frequency band and is set to
one wavelength at the fourth frequency band.
17. The antenna of claim 13, wherein the third feeding unit
corresponds to a 1/4 point of a length of a circumference of the
loop antenna.
18. The antenna of claim 12, wherein one end of each of the inner
loop and the outer loop is close to another end of each of the
inner loop and the outer loop so that a radio frequency (RF) signal
at the one end of each of the inner loop and the other loop is
coupled to a respective one of the another end of the inner loop
and the outer loop, and wherein the another end of each of the
inner loop and the outer loop is open.
Description
CROSS-REFERENCE TO RELATED APPLICATION
Pursuant to 35 U.S.C. .sctn. 119(a), this application claims the
benefit of earlier filing date and right of priority to Korean
Application No. 10-2016-0010185, filed on Jan. 27, 2016, the
contents of which are all hereby incorporated by reference herein
in its entirety.
BACKGROUND OF THE DISCLOSURE
1. Field of the Disclosure
The present disclosure relates to a watch-type mobile terminal
including an antenna, and particularly, to a multi-band antenna
accommodated into a body of a watch-type mobile terminal.
2. Background of the Disclosure
Terminals may be generally classified as mobile/portable terminals
or stationary terminals according to their mobility. Mobile
terminals may also be classified as handheld terminals or vehicle
mounted terminals according to whether or not a user can directly
carry the terminal.
Mobile terminals have become increasingly more functional. Examples
of such functions may include data and voice communications,
capturing images and video through a camera, recording audio,
playing music files through a speaker system, and displaying images
and video on a display unit. Some mobile terminals additionally
provide functions such as playing an electronic game, or executing
a function of multimedia players. Especially, recent mobile
terminals may receive multicast signal for providing visual content
such as broadcasts, videos, or television programs.
As it becomes multifunctional, a mobile terminal can be allowed to
capture still images or moving images, play music or video files,
play games, receive broadcast and the like, so as to be implemented
as an integrated multimedia player.
Recently, mobile terminals may be provided as watch-type mobile
terminals wearable on human bodies. In the watch-type mobile
terminals, since a number of electronic elements should be mounted
in a narrow mounting space, there is a limitation in space. Even in
the watch-type mobile terminals, needs for a plurality of
communication services are increasing. To this end, a plurality of
antennas for providing the plurality of communication services
cannot all be mounted on each of the watch-type mobile
terminals.
SUMMARY OF THE DISCLOSURE
Therefore, an aspect of the detailed description is to provide a
watch-type mobile terminal for solving the above-described problems
and the other problems.
Another aspect of the detailed description is to provide one
antenna for providing a plurality of communication services.
To achieve these and other advantages and in accordance with the
purpose of this specification, as embodied and broadly described
herein, a watch-type mobile terminal includes: a body configuring
an external appearance of a watch and operating as a loop antenna;
a plurality of feeding units applying each of a plurality of
communication signals to the loop antenna; and a ground part
connected to a ground of the watch. In this case, the body
includes: a metal housing connected to the ground part, the metal
housing corresponding to an outer loop; a metal bezel connected to
the plurality of feeding units, the metal bezel corresponding to
the inner loop; and a slot member disposed between the metal
housing and the metal bezel to electrically disconnect the metal
housing from the metal bezel.
According to an embodiment, the plurality of feeding units may
include: a first feeding unit applying a communication signal at a
first frequency band and a second frequency band for a mobile
communication service; a second feeding unit applying a
communication signal at a third frequency band and a fourth
frequency band for a Wi-Fi or Bluetooth communication service; and
a third feeding unit applying a radio frequency (RF) signal at a
fifth frequency band for a global positioning system (GPS)
service.
According to an embodiment, the first feeding unit and the second
feeding unit may be connected to the inner loop and the outer loop,
and the third feeding unit may be slot-fed to a space between the
inner loop and the outer loop.
According to an embodiment, one end of each of the inner loop and
the outer loop may be close to another end of each of inner loop
and the outer loop so that a radio frequency (RF) signal at the one
end is coupled to the other end, and the other end of each of inner
loop and the outer loop may be open.
According to an embodiment, the second frequency band may be a
frequency band which is higher than the first frequency band, and a
length of a circumference of the loop antenna may be set to a half
wave length at the first frequency band and may be set to one wave
length at the second frequency band.
According to an embodiment, the fourth frequency band may be a
frequency band which is higher than the third frequency band, and a
length from the second feeding unit to the ground part may be set
to a half wave length at the third frequency band and may be set to
one wave length at the fourth frequency band.
According to an embodiment, the third feeding unit may correspond
to a 1/4 point of a length of a circumference of the loop antenna
from the one end.
According to an embodiment, the first to third feeding units may be
vertically coupled to the loop antenna.
In another aspect of the present invention, an antenna includes: an
inner loop having an open type; an outer loop spaced apart from the
inner loop by a certain separation distance; a connector connected
to one end of each of the inner loop and the outer loop; a
plurality of feeding units applying each of a plurality of
communication signals at one point of each of the inner loop and
the outer loop; and a ground part connected to a ground of a watch
in one of the inner loop and the outer loop. In this case, the
inner loop and the outer loop are accommodated into a body
configuring an external appearance of a watch-type mobile
terminal.
According to an embodiment, the plurality of feeding units may
include: a first feeding unit applying a communication signal at a
first frequency band and a second frequency band for a mobile
communication service; a second feeding unit applying a
communication signal at a third frequency band and a fourth
frequency band for a Wi-Fi or Bluetooth communication service; and
a third feeding unit applying a radio frequency (RF) signal at a
fifth frequency band for a global positioning system (GPS)
service.
According to an embodiment, the third feeding unit may be slot-fed
to a space between the inner loop and the outer loop.
According to an embodiment, another end of each of inner loop and
the outer loop may be open, and the one end of each of the inner
loop and the outer loop may be close to the other end of each of
inner loop and the outer loop so that a radio frequency (RF) signal
at the one end is coupled to the other end.
According to an embodiment, the second frequency band may be a
frequency band which is higher than the first frequency band, and a
length of a circumference of the loop antenna may be set to a half
wave length at the first frequency band and may be set to one wave
length at the second frequency band.
According to an embodiment, the fourth frequency band may be a
frequency band which is higher than the third frequency band, and a
length from the second feeding unit to the ground part may be set
to a half wave length at the third frequency band and may be set to
one wave length at the fourth frequency band.
According to an embodiment, the third feeding unit may correspond
to a 1/4 point of a length of a circumference of the loop antenna
from the one end.
According to an embodiment, the metal housing and the metal bezel
may be connected to each other at one end thereof.
According to an embodiment, the plurality of feeding units may each
include a pin into which a spring is inserted. Also, the pin may be
accommodated into a groove of the metal bezel, and when the metal
bezel rotates, the metal bezel and the pin may be electrically
connected to each other.
According to an embodiment, the plurality of feeding units may each
include an arch type spring, and when the spring contacts a contact
guide of the metal bezel and the metal bezel rotates, the metal
bezel and the pin may be electrically connected to each other.
Further scope of applicability of the present application will
become more apparent from the detailed description given
hereinafter. However, it should be understood that the detailed
description and specific examples, while indicating preferred
embodiments of the disclosure, are given by way of illustration
only, since various changes and modifications within the spirit and
scope of the disclosure will become apparent to those skilled in
the art from the detailed description.
BRIEF DESCRIPTION OF THE DRAWINGS
The accompanying drawings, which are included to provide a further
understanding of the disclosure and are incorporated in and
constitute a part of this specification, illustrate exemplary
embodiments and together with the description serve to explain the
principles of the disclosure.
In the drawings:
FIG. 1A is a block diagram for describing a mobile terminal
according to an embodiment of the present invention;
FIGS. 1B and 1C are conceptual views when an example of a mobile
terminal according to an embodiment of the present invention is
seen in different directions;
FIG. 2 is a perspective view illustrating an example of a
watch-type mobile terminal according to another embodiment of the
present invention;
FIG. 3 is an exploded view of a watch illustrating a body of a
watch according to an embodiment of the present invention and an
antenna and a printed circuit board (PCB) accommodated into the
body;
FIG. 4 illustrates a loop antenna including a plurality of feeding
units and one ground part, according to an embodiment of the
present;
FIG. 5 illustrates a feeding structure and a body including a metal
housing, a metal bezel, and a slot member in a watch-type mobile
terminal according to an embodiment of the present invention;
FIG. 6 illustrates a variable bezel feeding contact according to an
embodiment of the present invention;
FIG. 7 illustrates the operation principle of an antenna at a first
frequency band and a second frequency band based on feeding in a
first feeding unit according to an embodiment of the present
invention;
FIG. 8 illustrates the operation principle of an antenna at a third
frequency band and a fourth frequency band based on feeding in a
second feeding unit according to an embodiment of the present
invention;
FIG. 9 illustrates the operation principle of an antenna at a fifth
frequency band based on feeding in a third feeding unit according
to an embodiment of the present invention;
FIG. 10 illustrates a change in a radiation pattern of an antenna
accommodated into a watch according to an embodiment of the present
invention, based on whether the watch is worn; and
FIG. 11 illustrates an embodiment of a loop antenna capable of
being equipped in a watch according to an embodiment of the present
invention. A plurality of communication services may be
simultaneously provided through one antenna.
DETAILED DESCRIPTION OF THE DISCLOSURE
Description will now be given in detail according to exemplary
embodiments disclosed herein, with reference to the accompanying
drawings. For the sake of brief description with reference to the
drawings, the same or equivalent components may be provided with
the same or similar reference numbers, and description thereof will
not be repeated. In general, a suffix such as "module" and "unit"
may be used to refer to elements or components. Use of such a
suffix herein is merely intended to facilitate description of the
specification, and the suffix itself is not intended to give any
special meaning or function. In the present disclosure, that which
is well-known to one of ordinary skill in the relevant art has
generally been omitted for the sake of brevity. The accompanying
drawings are used to help easily understand various technical
features and it should be understood that the embodiments presented
herein are not limited by the accompanying drawings. As such, the
present disclosure should be construed to extend to any
alterations, equivalents and substitutes in addition to those which
are particularly set out in the accompanying drawings.
It will be understood that although the terms first, second, etc.
may be used herein to describe various elements, these elements
should not be limited by these terms. These terms are generally
only used to distinguish one element from another.
It will be understood that when an element is referred to as being
"connected with" another element, the element can be connected with
the other element or intervening elements may also be present. In
contrast, when an element is referred to as being "directly
connected with" another element, there are no intervening elements
present.
A singular representation may include a plural representation
unless it represents a definitely different meaning from the
context.
Terms such as "include" or "has" are used herein and should be
understood that they are intended to indicate an existence of
several components, functions or steps, disclosed in the
specification, and it is also understood that greater or fewer
components, functions, or steps may likewise be utilized.
Mobile terminals presented herein may be implemented using a
variety of different types of terminals. Examples of such terminals
include cellular phones, smart phones, user equipment, laptop
computers, digital broadcast terminals, personal digital assistants
(PDAs), portable multimedia players (PMPs), navigators, portable
computers (PCs), slate PCs, tablet PCs, ultra books, wearable
devices (for example, smart glasses), head mounted displays (HMDs),
and the like.
By way of non-limiting example only, further description will be
made with reference to particular types of mobile terminals.
However, such teachings apply equally to other types of terminals,
such as those types noted above. In addition, these teachings may
also be applied to stationary terminals such as digital TV, desktop
computers, and a digital signage.
Reference is now made to FIGS. 1A-1C, where FIG. 1A is a block
diagram of a mobile terminal in accordance with the present
disclosure, and FIGS. 1B and 1C are conceptual views of one example
of the mobile terminal, viewed from different directions.
The mobile terminal 100 is shown having components such as a
wireless communication unit 110, an input unit 120, a sensing unit
140, an output unit 150, an interface unit 160, a memory 170, a
controller 180, and a power supply unit 190. It is understood that
implementing all of the illustrated components of FIG. 1A is not a
requirement, and that greater or fewer components may alternatively
be implemented.
Referring now to FIG. 1A, the wireless communication unit 110
typically includes one or more modules which permit communications
such as wireless communications between the mobile terminal 100 and
a wireless communication system, communications between the mobile
terminal 100 and another mobile terminal, communications between
the mobile terminal 100 and an external server. Further, the
wireless communication unit 110 typically includes one or more
modules which connect the mobile terminal 100 to one or more
networks.
To facilitate such communications, the wireless communication unit
110 includes one or more of a broadcast receiving module 111, a
mobile communication module 112, a wireless Internet module 113, a
short-range communication module 114, and a location information
module 115.
The input unit 120 includes a camera 121 for obtaining images or
video, a microphone 122, which is one type of audio input device
for inputting an audio signal, and a user input unit 123 (for
example, a touch key, a push key, a mechanical key, a soft key, and
the like) for allowing a user to input information. Data (for
example, audio, video, image, and the like) is obtained by the
input unit 120 and may be analyzed and processed by controller 180
according to device parameters, user commands, and combinations
thereof.
The sensing unit 140 is typically implemented using one or more
sensors configured to sense internal information of the mobile
terminal, the surrounding environment of the mobile terminal, user
information, and the like. For example, in FIG. 1A, the sensing
unit 140 is shown having a proximity sensor 141 and an illumination
sensor 142. If desired, the sensing unit 140 may alternatively or
additionally include other types of sensors or devices, such as a
touch sensor, an acceleration sensor, a magnetic sensor, a
G-sensor, a gyroscope sensor, a motion sensor, an RGB sensor, an
infrared (IR) sensor, a finger scan sensor, a ultrasonic sensor, an
optical sensor (for example, camera 121), a microphone 122, a
battery gauge, an environment sensor (for example, a barometer, a
hygrometer, a thermometer, a radiation detection sensor, a thermal
sensor, and a gas sensor, among others), and a chemical sensor (for
example, an electronic nose, a health care sensor, a biometric
sensor, and the like), to name a few.
The output unit 150 is typically configured to output various types
of information, such as audio, video, tactile output, and the like.
The output unit 150 is shown having a display unit 151, an audio
output module 152, a haptic module 153, and an optical output
module 154. The display unit 151 may have an inter-layered
structure or an integrated structure with a touch sensor in order
to facilitate a touch screen. The touch screen may provide an
output interface between the mobile terminal 100 and a user, as
well as function as the user input unit 123 which provides an input
interface between the mobile terminal 100 and the user.
The interface unit 160 serves as an interface with various types of
external devices that can be coupled to the mobile terminal 100.
The interface unit 160, for example, may include any of wired or
wireless ports, external power supply ports, wired or wireless data
ports, memory card ports, ports for connecting a device having an
identification module, audio input/output (I/O) ports, video I/O
ports, earphone ports, and the like. In some cases, the mobile
terminal 100 may perform assorted control functions associated with
a connected external device, in response to the external device
being connected to the interface unit 160.
The memory 170 is typically implemented to store data to support
various functions or features of the mobile terminal 100. For
instance, the memory 170 may be configured to store application
programs executed in the mobile terminal 100, data or instructions
for operations of the mobile terminal 100, and the like. Some of
these application programs may be downloaded from an external
server via wireless communication. Other application programs may
be installed within the mobile terminal 100 at time of
manufacturing or shipping, which is typically the case for basic
functions of the mobile terminal 100 (for example, receiving a
call, placing a call, receiving a message, sending a message, and
the like). It is common for application programs to be stored in
the memory 170, installed in the mobile terminal 100, and executed
by the controller 180 to perform an operation (or function) for the
mobile terminal 100.
The controller 180 typically functions to control overall operation
of the mobile terminal 100, in addition to the operations
associated with the application programs. The controller 180 may
provide or process information or functions appropriate for a user
by processing signals, data, information and the like, which are
input or output by the various components depicted in FIG. 1A, or
activating application programs stored in the memory 170. As one
example, the controller 180 controls some or all of the components
illustrated in FIGS. 1A-1C according to the execution of an
application program that have been stored in the memory 170.
The power supply unit 190 receives external power or provide
internal power and supply the appropriate power required for
operating respective elements and components included in the mobile
terminal 100. The power supply unit 190 may include a battery,
which is typically rechargeable or be detachably coupled to the
terminal body for charging.
Referring now to FIGS. 1B and 1C, the mobile terminal 100 is
described with reference to a bar-type terminal body. However, the
mobile terminal 100 may alternatively be implemented in any of a
variety of different configurations. Examples of such
configurations include watch-type, clip-type, glasses-type, or as a
folder-type, flip-type, slide-type, swing-type, and swivel-type in
which two and more bodies are combined with each other in a
relatively movable manner, and combinations thereof. Discussion
herein will often relate to a particular type of mobile terminal
(for example, bar-type, watch-type, glasses-type, and the like).
However, such teachings with regard to a particular type of mobile
terminal will generally apply to other types of mobile terminals as
well.
The mobile terminal 100 will generally include a case (for example,
frame, housing, cover, and the like) forming the appearance of the
terminal. In this embodiment, the case is formed using a front case
101 and a rear case 102. Various electronic components are
incorporated into a space formed between the front case 101 and the
rear case 102. At least one middle case may be additionally
positioned between the front case 101 and the rear case 102.
The display unit 151 is shown located on the front side of the
terminal body to output information. As illustrated, a window 151a
of the display unit 151 may be mounted to the front case 101 to
form the front surface of the terminal body together with the front
case 101.
In some embodiments, electronic components may also be mounted to
the rear case 102. Examples of such electronic components include a
detachable battery 191, an identification module, a memory card,
and the like. Rear cover 103 is shown covering the electronic
components, and this cover may be detachably coupled to the rear
case 102. Therefore, when the rear cover 103 is detached from the
rear case 102, the electronic components mounted to the rear case
102 are externally exposed.
As illustrated, when the rear cover 103 is coupled to the rear case
102, a side surface of the rear case 102 is partially exposed. In
some cases, upon the coupling, the rear case 102 may also be
completely shielded by the rear cover 103. In some embodiments, the
rear cover 103 may include an opening for externally exposing a
camera 121b or an audio output module 152b.
The cases 101, 102, 103 may be formed by injection-molding
synthetic resin or may be formed of a metal, for example, stainless
steel (STS), aluminum (Al), titanium (Ti), or the like.
As an alternative to the example in which the plurality of cases
form an inner space for accommodating components, the mobile
terminal 100 may be configured such that one case forms the inner
space. In this example, a mobile terminal 100 having a uni-body is
formed in such a manner that synthetic resin or metal extends from
a side surface to a rear surface.
If desired, the mobile terminal 100 may include a waterproofing
unit (not shown) for preventing introduction of water into the
terminal body. For example, the waterproofing unit may include a
waterproofing member which is located between the window 151a and
the front case 101, between the front case 101 and the rear case
102, or between the rear case 102 and the rear cover 103, to
hermetically seal an inner space when those cases are coupled.
FIGS. 1B and 1C depict certain components as arranged on the mobile
terminal. However, it is to be understood that alternative
arrangements are possible and within the teachings of the instant
disclosure. Some components may be omitted or rearranged. For
example, the first manipulation unit 123a may be located on another
surface of the terminal body, and the second audio output module
152b may be located on the side surface of the terminal body.
The display unit 151 outputs information processed in the mobile
terminal 100. The display unit 151 may be implemented using one or
more suitable display devices. Examples of such suitable display
devices include a liquid crystal display (LCD), a thin film
transistor-liquid crystal display (TFT-LCD), an organic light
emitting diode (OLED), a flexible display, a 3-dimensional (3D)
display, an e-ink display, and combinations thereof.
The display unit 151 may be implemented using two display devices,
which can implement the same or different display technology. For
instance, a plurality of the display units 151 may be arranged on
one side, either spaced apart from each other, or these devices may
be integrated, or these devices may be arranged on different
surfaces.
The display unit 151 may also include a touch sensor which senses a
touch input received at the display unit. When a touch is input to
the display unit 151, the touch sensor may be configured to sense
this touch and the controller 180, for example, may generate a
control command or other signal corresponding to the touch. The
content which is input in the touching manner may be a text or
numerical value, or a menu item which can be indicated or
designated in various modes.
The touch sensor may be configured in a form of a film having a
touch pattern, disposed between the window 151a and a display on a
rear surface of the window 151a, or a metal wire which is patterned
directly on the rear surface of the window 151a. Alternatively, the
touch sensor may be integrally formed with the display. For
example, the touch sensor may be disposed on a substrate of the
display or within the display.
The display unit 151 may also form a touch screen together with the
touch sensor. Here, the touch screen may serve as the user input
unit 123 (see FIG. 1A). Therefore, the touch screen may replace at
least some of the functions of the first manipulation unit
123a.
The first audio output module 152a may be implemented in the form
of a speaker to output voice audio, alarm sounds, multimedia audio
reproduction, and the like.
The window 151a of the display unit 151 will typically include an
aperture to permit audio generated by the first audio output module
152a to pass. One alternative is to allow audio to be released
along an assembly gap between the structural bodies (for example, a
gap between the window 151a and the front case 101). In this case,
a hole independently formed to output audio sounds may not be seen
or is otherwise hidden in terms of appearance, thereby further
simplifying the appearance and manufacturing of the mobile terminal
100.
The optical output module 154 can be configured to output light for
indicating an event generation. Examples of such events include a
message reception, a call signal reception, a missed call, an
alarm, a schedule notice, an email reception, information reception
through an application, and the like. When a user has checked a
generated event, the controller can control the optical output unit
154 to stop the light output.
The first camera 121a can process image frames such as still or
moving images obtained by the image sensor in a capture mode or a
video call mode. The processed image frames can then be displayed
on the display unit 151 or stored in the memory 170.
A third camera 121c may be further provided on a front surface of
the terminal body. In this case, the third camera 121c may be
disposed near the first camera 121a, or near the opposite side to
the first camera 121a (i.e., the optical output unit 154).
The third camera 121c may be provided with a wide angle lens. In
this case, the third camera 121c may support a wider viewing angle
than the first camera 121a. In a general angle mode, the first
camera 121a may be activated for capturing. And in a wide angle
mode, the third camera 121c may be activated for capturing. An
image captured by the third camera 121c may include a larger number
of subjects than an image captured by the first camera 121a.
However, in this case, distortion occurs toward a peripheral part
of a frame.
The third camera 121c may be activated together with or
independently from the first camera 121a when the first camera 121a
is activated. If the third camera 121c is activated together when
the second camera 121b formed on a rear surface of the terminal
body is activated, an image captured by the third camera 121c may
be used to compensate for a white balance reference value of an
image captured by the first camera 121a.
The first and second manipulation units 123a and 123b are examples
of the user input unit 123, which may be manipulated by a user to
provide input to the mobile terminal 100. The first and second
manipulation units 123a and 123b may also be commonly referred to
as a manipulating portion, and may employ any tactile method that
allows the user to perform manipulation such as touch, push,
scroll, or the like. The first and second manipulation units 123a
and 123b may also employ any non-tactile method that allows the
user to perform manipulation such as proximity touch, hovering, or
the like.
FIG. 1B illustrates the first manipulation unit 123a as a touch
key, but possible alternatives include a mechanical key, a push
key, a touch key, and combinations thereof.
Input received at the first and second manipulation units 123a and
123b may be used in various ways. For example, the first
manipulation unit 123a may be used by the user to provide an input
to a menu, home key, cancel, search, or the like, and the second
manipulation unit 123b may be used by the user to provide an input
to control a volume level being output from the first or second
audio output modules 152a or 152b, to switch to a touch recognition
mode of the display unit 151, or the like.
As another example of the user input unit 123, a rear input unit
(not shown) may be located on the rear surface of the terminal
body. The rear input unit can be manipulated by a user to provide
input to the mobile terminal 100. The input may be used in a
variety of different ways. For example, the rear input unit may be
used by the user to provide an input for power on/off, start, end,
scroll, control volume level being output from the first or second
audio output modules 152a or 152b, switch to a touch recognition
mode of the display unit 151, and the like. The rear input unit may
be configured to permit touch input, a push input, or combinations
thereof.
The rear input unit may be located to overlap the display unit 151
of the front side in a thickness direction of the terminal body. As
one example, the rear input unit may be located on an upper end
portion of the rear side of the terminal body such that a user can
easily manipulate it using a forefinger when the user grabs the
terminal body with one hand. Alternatively, the rear input unit can
be positioned at most any location of the rear side of the terminal
body.
Embodiments that include the rear input unit may implement some or
all of the functionality of the first manipulation unit 123a in the
rear input unit. As such, in situations where the first
manipulation unit 123a is omitted from the front side, the display
unit 151 can have a larger screen.
As a further alternative, the mobile terminal 100 may include a
finger scan sensor which scans a user's fingerprint. The controller
180 can then use fingerprint information sensed by the finger scan
sensor as part of an authentication procedure. The finger scan
sensor may also be installed in the display unit 151 or implemented
in the user input unit 123.
The microphone 122 is shown located at an end of the mobile
terminal 100, but other locations are possible. If desired,
multiple microphones may be implemented, with such an arrangement
permitting the receiving of stereo sounds.
The interface unit 160 may serve as a path allowing the mobile
terminal 100 to interface with external devices. For example, the
interface unit 160 may include one or more of a connection terminal
for connecting to another device (for example, an earphone, an
external speaker, or the like), a port for near field communication
(for example, an Infrared Data Association (IrDA) port, a Bluetooth
port, a wireless LAN port, and the like), or a power supply
terminal for supplying power to the mobile terminal 100. The
interface unit 160 may be implemented in the form of a socket for
accommodating an external card, such as Subscriber Identification
Module (SIM), User Identity Module (UIM), or a memory card for
information storage.
The second camera 121b is shown located at the rear side of the
terminal body and includes an image capturing direction that is
substantially opposite to the image capturing direction of the
first camera unit 121a. If desired, second camera 121a may
alternatively be located at other locations, or made to be
moveable, in order to have a different image capturing direction
from that which is shown.
The second camera 121b can include a plurality of lenses arranged
along at least one line. The plurality of lenses may also be
arranged in a matrix configuration. The cameras may be referred to
as an "array camera." When the second camera 121b is implemented as
an array camera, images may be captured in various manners using
the plurality of lenses and images with better qualities.
As shown in FIG. 1C, a flash 124 is shown adjacent to the second
camera 121b. When an image of a subject is captured with the camera
121b, the flash 124 may illuminate the subject.
As shown in FIG. 1B, the second audio output module 152b can be
located on the terminal body. The second audio output module 152b
may implement stereophonic sound functions in conjunction with the
first audio output module 152a, and may be also used for
implementing a speaker phone mode for call communication.
At least one antenna for wireless communication may be located on
the terminal body. The antenna may be installed in the terminal
body or formed by the case. For example, an antenna which
configures a part of the broadcast receiving module 111 may be
retractable into the terminal body. Alternatively, an antenna may
be formed using a film attached to an inner surface of the rear
cover 103, or a case that includes a conductive material.
A power supply unit 190 for supplying power to the mobile terminal
100 may include a battery 191, which is mounted in the terminal
body or detachably coupled to an outside of the terminal body. The
battery 191 may receive power via a power source cable connected to
the interface unit 160. Also, the battery 191 can be recharged in a
wireless manner using a wireless charger. Wireless charging may be
implemented by magnetic induction or electromagnetic resonance.
The rear cover 103 is shown coupled to the rear case 102 for
shielding the battery 191, to prevent separation of the battery
191, and to protect the battery 191 from an external impact or from
foreign material. When the battery 191 is detachable from the
terminal body, the rear case 103 may be detachably coupled to the
rear case 102.
An accessory for protecting an appearance or assisting or extending
the functions of the mobile terminal 100 can also be provided on
the mobile terminal 100. As one example of an accessory, a cover or
pouch for covering or accommodating at least one surface of the
mobile terminal 100 may be provided. The cover or pouch may
cooperate with the display unit 151 to extend the function of the
mobile terminal 100. Another example of the accessory is a touch
pen for assisting or extending a touch input to a touch screen.
As previously described with regard to FIG. 1A, the mobile terminal
may be configured to include short-range communication techniques
such as Bluetooth.TM., Radio Frequency Identification (RFID),
Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee,
Near Field Communication (NFC), Wireless USB (Wireless Universal
Serial Bus), and the like.
FIG. 2 is a perspective view illustrating one example of a
watch-type mobile terminal 200 in accordance with another exemplary
embodiment.
As illustrated in FIG. 2, the watch-type mobile terminal 200
includes a main body 201 with a display unit 251 and a band 202
connected to the main body 201 to be wearable on a wrist. In
general, mobile terminal 200 may be configured to include features
that are the same or similar to that of mobile terminal 100 of
FIGS. 1A-1C.
The main body 201 may include a case having a certain appearance.
As illustrated, the case may include a first case 201a and a second
case 201b cooperatively defining an inner space for accommodating
various electronic components. Other configurations are possible.
For instance, a single case may alternatively be implemented, with
such a case being configured to define the inner space, thereby
implementing a mobile terminal 200 with a uni-body.
The watch-type mobile terminal 200 can perform wireless
communication, and an antenna for the wireless communication can be
installed in the main body 201. The antenna may extend its function
using the case. For example, a case including a conductive material
may be electrically connected to the antenna to extend a ground
area or a radiation area.
The display unit 251 is shown located at the front side of the main
body 201 so that displayed information is viewable to a user. In
some embodiments, the display unit 251 includes a touch sensor so
that the display unit can function as a touch screen. As
illustrated, window 251a is positioned on the first case 201a to
form a front surface of the terminal body together with the first
case 201a.
The illustrated embodiment includes audio output module 252, a
camera 221, a microphone 222, and a user input unit 223 positioned
on the main body 201. When the display unit 251 is implemented as a
touch screen, additional function keys may be minimized or
eliminated. For example, when the touch screen is implemented, the
user input unit 223 may be omitted.
The band 202 is commonly worn on the user's wrist and may be made
of a flexible material for facilitating wearing of the device. As
one example, the band 202 may be made of fur, rubber, silicon,
synthetic resin, or the like. The band 202 may also be configured
to be detachable from the main body 201. Accordingly, the band 202
may be replaceable with various types of bands according to a
user's preference.
In one configuration, the band 202 may be used for extending the
performance of the antenna. For example, the band may include
therein a ground extending portion (not shown) electrically
connected to the antenna to extend a ground area.
The band 202 may include fastener 202a. The fastener 202a may be
implemented into a buckle type, a snap-fit hook structure, a
Velcro.RTM. type, or the like, and include a flexible section or
material. The drawing illustrates an example that the fastener 202a
is implemented using a buckle.
As described above with reference to FIGS. 1A to 1C and 2,
according to an embodiment of the present invention, the body 201
may be implemented with a metal material for preventing an external
appearance from being damaged in use and improving a design. In
this case, an antenna that transmits an electromagnetic wave to a
free space through a wireless communication unit 110 or receives
the electromagnetic wave through the free space is inevitably
affected by the body 201. Also, due to an internal narrow mounting
space of the watch-type mobile terminal 200, the watch-type mobile
terminal 200 cannot include all of a plurality of antennas for
providing a plurality of communication services.
In order to solve such problems, the watch-type mobile terminal 200
including a body and an antenna accommodated into the body
according to an embodiment of the present invention will be
described below in detail with reference to FIGS. 3 to 9.
FIG. 3 is an exploded view of a watch illustrating a body of a
watch according to an embodiment of the present invention and an
antenna and a PCB accommodated into the body.
FIG. 4 illustrates a loop antenna including a plurality of feeding
units and one ground part, according to an embodiment of the
present.
Referring to FIGS. 3 and 4, a watch-type mobile terminal 300 may
include a body 301 and a loop antenna 400.
The body 301 may configure an external appearance of the watch.
Here, a supporting part (or deco) for supporting a display unit of
the watch may be equipped in the body 301. Therefore, a slot may be
provided in the supporting part (or deco), and thus, the loop
antenna 400 including an inner loop and an outer loop may be
provided.
The loop antenna 400 may include an inner loop 410, an outer loop
420, a plurality of feeding units 430, and a ground part 440. Also,
the loop antenna 400 may further include a connector 450.
That is, the loop antenna 400 may include the inner loop 410 having
an open type and the outer loop 420 having an open type. The loop
antenna 400 may be accommodated into the body 301.
In this case, the outer loop 420 may be spaced apart from the inner
loop 410 by a certain separation distance.
In this case, the loop antenna 400 may be connected to one end of
each of the inner loop 410 and the outer loop 420. Here, a
switching element may be provided in the one end, and thus, the one
end may be electrically turned on or off.
Moreover, the loop antenna 400 may include the plurality of feeding
units 430 for respectively applying a plurality of communication
signals and the ground part 440 connected to a ground of the
watch.
The inner loop 410 may include a metal material and may have a
circular shape and an open type. Also, the outer loop 420 may
include a metal material and may have a circular shape and an open
type. The outer loop 420 may be spaced apart from the inner loop
410 by a certain separation distance.
The plurality of feeding units 430 may respectively apply the
plurality of communication signals at one point of each of the
inner loop 410 and the outer loop 420.
The ground part 440 may be connected to the ground of the watch in
one of the inner loop 410 and the outer loop 420. The ground part
440 may include a switching element so that one of the inner loop
410 and the outer loop 420 is electrically connected to or
disconnected from the ground. Resonance lengths which physically
differ at different frequency bands may be provided at a first
frequency band and a second frequency band by the switching
element.
The connector 450 may connect the inner loop 410 and the outer loop
420 at one end of each of the inner loop 410 having an open type
and the outer loop 420 which is spaced apart from the inner loop
410 by the certain separation distance. Here, the connector 450 may
include a switching element, and thus, the one end may be
electrically turned on or off.
As illustrated in FIGS. 3 and 4, the other end of the inner loop
410 and the other end of the outer loop 420 may be open. In this
case, a radio frequency (RF) signal at the one end of the connector
450 may be coupled to the other end, and then one end may get
closer to the other end. Also, according to another embodiment of
the present invention, the one end and the other end of each of the
inner loop 410 and the outer loop 420 may be electrically turned on
or off by the switching element. Due to the turn-on or off, a
resonance length of the inner loop 410 and a resonance length of
the outer loop 420 may be differently provided at different
frequency bands.
The plurality of feeding units 430 will be described below in
detail. The plurality of feeding units 430 may include a first
feeding unit 431, a second feeding unit 432, and a third feeding
unit 433. The first feeding unit 431 may apply a communication
signal at the first frequency band and the second frequency band
for a mobile communication service. The second feeding unit 432 may
apply a communication signal at the third frequency band and the
fourth frequency band for a Wi-Fi or Bluetooth communication
service. Also, the third feeding unit 433 may apply an RF signal at
the fifth frequency band for a global positioning system (GPS)
service.
FIG. 5 illustrates a feeding structure and a body including a metal
housing, a metal bezel, and a slot member in a watch-type mobile
terminal 500 according to an embodiment of the present invention.
In this context, unlike the antenna equipped in the body in FIGS. 3
and 4, each of the metal housing and the metal bezel of the body
may operate an antenna in FIG. 5. When a user rotates the metal
bezel, the metal bezel corresponding to a rotary body and a part
corresponding to a fixing body may maintain a contact state
therebetween. The contact state between the metal bezel (the rotary
body) and the fixing body may be referred to as a moving bezel
feeding contact.
FIG. 5 (a) is an exploded view of the feeding structure and the
body including the metal housing, the metal bezel, and the slot
member in the watch-type mobile terminal 500. On the other hand,
FIG. 5 (a) is a side view of the body including the metal housing,
the metal bezel, and the slot member in the watch-type mobile
terminal 500.
Referring to FIG. 5 (a), the watch-type mobile terminal 500 may
include a body 510, a plurality of feeding units 430, and a ground
part 440.
Referring to FIG. 5 (b), the body 510 may configure an external
appearance of the watch and may operate a loop antenna. Here, a
supporting part (or deco) that supports a display unit of the watch
may be equipped in the body 510. Therefore, a slot may be provided
in the supporting part (or deco), and thus, a loop antenna
including an inner loop and an outer loop may be provided.
The body 510 may include a metal housing 511, a metal bezel 512,
and a slot member 513.
The metal housing 511 may correspond to the outer loop 420 of FIG.
4 and may be connected to the ground part 440.
The metal bezel 512 may correspond to the outer loop 410 of FIG. 4
and may be connected to the plurality of feeding units 430. The
metal housing 511 and the metal bezel 512 may be connected to each
other at one end thereof, and the one end may correspond to the
connector 450 as illustrated in FIG. 4.
The slot member 513 may be disposed between the metal housing 511
and the metal bezel 512 and may electrically disconnect the metal
housing 511 from the metal bezel 512.
The plurality of feeding units 430 may respectively apply a
plurality of communication signals to the loop antenna. That is,
the plurality of feeding units 430 may respectively apply the
plurality of communication signals to the loop antenna, the metal
housing 511, and the metal bezel 512. The plurality of feeding
units 430, as described above with reference to FIGS. 3 and 4, may
include a first feeding unit 431, a second feeding unit 432, and a
third feeding unit 433. In this context, the above description may
be applied to each of frequency bands.
FIG. 6 illustrates a variable bezel feeding contact according to an
embodiment of the present invention. In more detail, FIG. 6 (a) is
a side view illustrating a guide rail type contact, and FIG. 6 (b)
is a conceptual view illustrating a guide rail type contact. Also,
FIG. 6 (a) is a side view illustrating a contact guide type
contact, and FIG. 6 (b) is a conceptual view illustrating a contact
guide type contact.
In this context, referring to FIGS. 6 (a) and (b), the metal bezel
512a may be configured in a guide rail type where a groove is
provided in the metal bezel 512a. The plurality of feeding units
430a may each be implemented with a pin into which a spring is
inserted. The pin may be accommodated into the groove of the metal
bezel 512a, and when the metal bezel 512 rotates, the metal bezel
512a and the pin may be electrically connected to each other.
In this context, referring to FIGS. 6 (c) and (d), the metal bezel
512b may be configured in a contact guide type which protrudes to
the outside. A plurality of feeding units 430b may each be
implemented with an arch type spring. A contact structure between
the metal bezel 512b and the plurality of feeding units 430b may be
referred to as a bezel contact guide. When the spring contacts the
contact guide of the metal bezel 512b and thus the metal bezel 512b
rotates, the metal bezel 512b and the pin may be electrically
connected to each other.
The ground part 440 may be connected to a ground of the watch in
one of the metal housing 511 and the metal bezels 512a and 512b.
The ground part 440 may include a switching element so that one of
one of the metal housing 511 and the metal bezels 512a and 512b is
electrically connected to or disconnected from the ground part 440.
Resonance lengths which physically differ at different frequency
bands may be provided at the first frequency band and the second
frequency band by the switching element.
FIGS. 7 to 9 illustrate the operation principle of an antenna based
on feeding in first to third feeding units according to an
embodiment of the present invention.
FIG. 7 illustrates the operation principle of an antenna 400 at the
first frequency band and the second frequency band based on feeding
in the first feeding unit according to an embodiment of the present
invention.
In this context, the second frequency band may be a frequency band
which is higher than the first frequency band. For example, the
antenna 400 may provide a mobile communication service such as
WCDMA, LTE, and/or the like at the first frequency band and the
second frequency band. According to an embodiment, the first
frequency band may be an LTE frequency band, and the second
frequency band may be an additional frequency band for carrier
aggregation in LTE-A. The first frequency band and the second
frequency band are not limited to the LTE frequency band and the
LTE-A frequency band and may be partially changed for providing the
mobile communication service such as WCDMA, LTE, and/or the like.
In this case, a length of a circumference of the antenna 400 may be
set to a half wave length at the first frequency band and may be
set to one wave length at the second frequency band. That is, the
antenna 400 may operate as a loop antenna which has a half wave
length at the first frequency band and has one wave length at the
second frequency band.
Referring to FIG. 7 (a), an inner loop 410 may be connected to a
signal line of a PCB 460 through a first feeding unit 431, and an
outer loop 420 may be connected to a ground of the PCB 460 through
a ground part 440. In this case, the inner loop 410 and the outer
loop 420 may be a loop mode including two rings, and radiation by
an electric field may be performed through the outside of a loop.
In other embodiments, the inner loop 410 may be connected to the
ground of the PCB 460 through the first feeding unit 431, and the
outer loop 420 may be connected to the signal line of the PCB 460
through the ground part 440.
Referring to FIG. 7 (b), it can be seen that an intensity of an
electric field is the maximum (red) in a space between the inner
loop 410 and the outer loop 420, but as a distance between the
inner loop 410 and the outer loop 420 increases, the intensity of
the electric field is reduced (blue).
FIG. 8 illustrates the operation principle of an antenna at the
third frequency band and the fourth frequency band based on feeding
in a second feeding unit 432 according to an embodiment of the
present invention.
In this context, the fourth frequency band may be a frequency band
which is higher than the third frequency band. For example, the
antenna may provide a Wi-Fi service or a Bluetooth service at the
third frequency band and the fourth frequency band. In this
context, the third frequency band may be a frequency band for
providing a first Wi-Fi service and the Bluetooth service. Also,
the fourth frequency band may be a frequency band for providing a
second Wi-Fi service. For example, the first Wi-Fi service may
support 802.11b, 802.11g, 802.11n, and 802.11ad standards. Also,
the second Wi-Fi service may support 802.11a, 802.11n, and 802.11ad
standards. That is, a Wi-Fi service associated with 802.11n and
802.11ad standards may be provided at both the third frequency band
and the fourth frequency band.
The third frequency band and the fourth frequency band are not
limited to the above-described frequency bands for services and may
include a frequency band based on interface standard and a
communication service at an industrial science medical (ISM)
frequency band such as Wi-Fi, Bluetooth, Zigbee, etc. In this case,
a length from the second feeding unit 432 to a ground part 440 may
be set to a half wave length at the third frequency band and may be
set to one wave length at the fourth frequency band. That is, the
antenna may operate as a folded antenna which has a half wave
length at the third frequency band and has one wave length at the
fourth frequency band.
Referring to FIG. 8 (a), an inner loop 410 may be connected to a
signal line of a PCB 460 through the second feeding unit 432, and
an outer loop 420 may be connected to a ground of the PCB 460
through the ground part 440. In other embodiments, the inner loop
410 may be connected to the ground of the PCB 460 through the
second feeding unit 432, and the outer loop 420 may be connected to
the signal line of the PCB 460 through the ground part 440.
Referring to FIG. 8 (b), radiation of a loop mode having a length
corresponding to a 1/4 wave length and a half wave length of a
resonant mode may be performed between the second feeding unit 432
and the ground part 440. In this case, as illustrated in FIGS. 8
(b) and (c), it can be seen that an intensity of an electric field
is the maximum (red) in a space between the second feeding unit 432
and the ground part 440. On the other hand, it can be seen that as
a distance between the second feeding unit 432 and the ground part
440 increases, the intensity of the electric field is reduced
(blue).
FIG. 9 illustrates the operation principle of an antenna at the
fifth frequency band based on feeding in a third feeding unit 433
according to an embodiment of the present invention.
In this context, the fifth frequency band may include a frequency
band that supports a GPS L1/L2 service and a global navigation
satellite system (GLONASS) service. The fifth frequency band is not
limited to the frequency band for the GPS L1/L2 service and the
GLONASS service and may be partially changed for providing a
necessary GPS service. In this case, the third feeding unit 433 may
correspond to a 1/4 point of a length of a circumference of the
loop antenna from the one end. The third feeding unit 433 may be
slot-fed to a space between the inner loop 410 and the outer loop
420.
Referring to FIG. 9 (a), an electric field may be coupled to a
slot, corresponding to a space between the inner loop 410 and the
outer loop 420, by the third feeding unit 433. In this case, the
electric field coupled to the slot may correspond to a center of
the slot and may be the maximum electric field. In the electric
field, electric fields may be generated in both sides of the slot
corresponding to a half wave length.
As illustrated in FIG. 9 (a), an electric field from a signal line
of a PCB 460 may be coupled through the space between the inner
loop 410 and the outer loop 420.
As illustrated in FIG. 9 (b), if the antenna 400 is equipped in the
watch-type mobile terminal 300, it can be seen that an intensity of
an electric field is the maximum in the space between the inner
loop 410 and the outer loop 420, and as a distance between the
inner loop 410 and the outer loop 420 increases, the intensity of
the electric field is reduced. As illustrated in FIGS. 9 (a) and
(b), it can be seen that electric fields are mainly distributed in
only an area corresponding to a half of the inner loop 410 and the
outer loop 420, and thus, only the area corresponding to the half
operates as an antenna. The inner loop 410 and the outer loop 420
in FIGS. 7 to 9 may be replaced with the metal bezel 512 and the
metal housing 511 in FIGS. 5 and 6.
In a case where the antenna 400 described above with reference to
FIGS. 3 to 9 is accommodated into the watch-type mobile terminal
300 and operates, a change in a radiation pattern of the antenna
400 based on whether the watch is worn will be described below.
In this context, FIG. 10 illustrates a change in a radiation
pattern of an antenna accommodated into a watch according to an
embodiment of the present invention, based on whether the watch is
worn.
Referring to FIG. 10 (a), FIG. 10 (a) corresponds to a case where a
user does not wear the watch, and the case may be referred to as a
free mode. In the free mode, it can be seen that a maximum value of
a radiation pattern by the antenna 400 is toward an upper end of a
center of the watch-type mobile terminal 300.
Referring to FIG. 10 (b), FIG. 10 (b) corresponds to a case where
the user wears the watch, and the case may be referred to as a hand
mode. In the hand mode, the maximum value of the radiation pattern
by the antenna 400 is toward the upper end of the center of the
watch-type mobile terminal 300, and thus, it can be seen that there
is no change in the radiation pattern in the free mode. That is, a
radiation pattern difference between the free mode and the hand
mode corresponds to an effect where the user wears the watch, and
as the watch contacts a human body having a high permittivity, an
electric field near a contacted area is reduced.
Therefore, it can be seen that in a body-type antenna accommodated
into a watch, a change in a radiation pattern based on whether the
watch is worn is smaller than a band-type antenna accommodated into
a band of the watch.
FIG. 11 illustrates an embodiment of a loop antenna 900 capable of
being equipped in a watch according to an embodiment of the present
invention. A plurality of communication services may be
simultaneously provided through one antenna.
As illustrated in FIG. 11, in the loop antenna 900, a slot 960 may
be provided in a circular ring antenna 900. The circular ring
antenna 900 may be divided into an inner loop 910 and an outer loop
920 by the slot 960. In this case, each of the inner loop 910 and
the outer loop 920 may be connected to a feeding unit 930 and a
ground part 940. As described above, since the circular ring
antenna 900 is capable of being equipped in the watch, the antenna
900 may be manufactured as a substrate type PCB or a flexible PCB
and may be easily accommodated into the watch.
Effects of the watch-type mobile terminal including an antenna
according to the embodiments of the present invention will be
described below.
According to at least one of the embodiments of the present
invention, one antenna may include a plurality of feeding units,
and thus, a plurality of communication services may be provided
through the one antenna.
Moreover, according to at least one of the embodiments of the
present invention, by simultaneously applying a signal to the
plurality of feeding units, the plurality of communication services
may be simultaneously provided through the one antenna.
The foregoing embodiments and advantages are merely exemplary and
are not to be considered as limiting the present disclosure. The
present teachings can be readily applied to other types of
apparatuses. This description is intended to be illustrative, and
not to limit the scope of the claims. Many alternatives,
modifications, and variations will be apparent to those skilled in
the art. The features, structures, methods, and other
characteristics of the exemplary embodiments described herein may
be combined in various ways to obtain additional and/or alternative
exemplary embodiments.
As the present features may be embodied in several forms without
departing from the characteristics thereof, it should also be
understood that the above-described embodiments are not limited by
any of the details of the foregoing description, unless otherwise
specified, but rather should be considered broadly within its scope
as defined in the appended claims, and therefore all changes and
modifications that fall within the metes and bounds of the claims,
or equivalents of such metes and bounds are therefore intended to
be embraced by the appended claims.
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